It’s update-day today. First 10.4.11 now 10.5.1.
No problems with 10.4.11 so far.
I installed the 10.5.1 update via software update first and got a couple of messages while repairing permissions afterwards. A bunch of SUID program … not repaired to be precise. I decided to download the combined patch from Apple’s download section and applied it as well. The messages are gone, except the one about ARD which appeared after the initial install of Leopard. This seems to be a known problem according to this message, though.